A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

Village of slate houses, built on a white marble outcrop.

This 11th-century temple gave rise to the word "juggernaut," as well as some mysteries that defy scientific explanation.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

The home of half the world's population of critically endangered mountain gorillas.

A hiking/biking/exploring trail that winds across over 140 miles of Rwandan shoreline.

These homes carved into the mountains seem to defy the laws of nature.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.